Lunch box



1.1 is a perspective, showing my new design,

1.2 is a front view thereof,

1.3 is a back view thereof,

1.4 is a right view thereof,

1.5 is an left view thereof,

1.6 is a top view thereof,

1.7 is a bottom view thereof. 

CLAIM I claim, the ornamental design for a lunch box, as shown and described. 